Forging machine



Aug. 25, 1931.

W. H. WINEMAN FORGING MACHINE Filed Oct. 28. 1925 2 Sheets-Sheet 1 zlfade Ella/7297mm Aug. 25, 1931 w. H. WINEMAN FORGING MACHINE Filed Oct. 28. 1925 2 Sheets-Sheet 2 w W W m N w b A w M M wa m w |i 1 .R w FHHUHIMIIHWHHI ||||||11||HH|J 1 r R 1 m w w w Patented Aug. 25, 1931 UNITED STATES PATENT oFF cE.

WADE H. WINEMAN, OF MICHIGAN CITY, INDIANA, ASSIGNOR T SULLIVAN MACHINERY COMPANY, A CORPORATION OF MASSACHUSETTS I FORGING MACHINE Application filed October 28, 1925.

lVhile this invention relates generally to improvements in forging machlnes, 1t is directed more particularly to a pinning or drill steel hole reforming device. 7 In forging a bit end of hollow drill steels,

as when resharpening, the hole becomes closed and itis necessary to reopen it as the final step in the operation of resharpening. This may be accomplished most readily by driving 10 a pin-like punch into the steel by a series of hammer blows and upon completion of the forward driving to remove the punch by imparting thereto hammer action in the opposite direction. lVhen the punch is being hammered into the steel, two forces must be overcome, first, the friction between the punch and steel and, second, the force necessary to actually expandthe metal adjacent the hole. Thus a relatively great number of hammer blows must be imparted to the punch to overcome these forces. The force for eX- panding the steel of course is greater than the friction forces. Accordingly it will be seen that the amount of force necessary to withdraw the punch is equal substantially to only the friction forces between the punch and steel so that the total rearward driving force necessary is materially less than the forward driving force.

It is accordingly an object of my invention to provide hole opening mechanism having impact means whereby the total rearward hammer driving force will be substantially that necessary to overcome the friction above referred to and whereby the total forward hammering forces will be substantially equal to the friction and steel expandingresistance to be overcome. To accomplish this I provide improved means whereby, when fully operative, for a given length of time the total forward hammering force will be greater than the total rearward driving force, with resulting power economy. In one specific aspect of the invention I have accomplished this object by providing a plurality of fluid actuated hammering mechanisms one of which is adapted to impart a series of forward hammering blows to the punch and the other to impart to the punch preferably a single hammer blow in a rearward direction.

Serial No. 65,452.

action over the second hammering mecha nism.

, A further object is to provide improved means whereby the forward hammering blows may be effected automatically after turning on of the actuating fluid and in turn effect a partial control over the second or retracting mechanism.

In the specific embodiment of the invention hereinafter described in detail the different mentioned objects are attained by a structure embodying substantially a support adapted to longitudinally slidably receive a carriage which is provided with a cylinder and hammer piston, and a pneumatic motor mounted on the carriage andadapted to move therewith. The means for controlling the rearward hammering mechanism by the forward hammering mechanism comprises means whereby the exhaust fluid from the forward hammering mechanism enters the cylinder of the rearward hammering mechanism to move the piston therein to a forward position where it will remain stationary until suitable control means are actuated to admit pressure fluid in the forward end of the cylinder to drive the piston rearwardly and there-- by transmit a rearward impact action to the punch. V

In the accompanying drawings I have shown for purposes of illustration one form which my invention may assume in practice.

In these drawings,

Fig. 1 is a side elevation.

Fig. 2 is a plan View partly broken away show details of construction.

Fig. 3 is a side elevation with the supporting bracket omitted andparts broken away to show details of construction. 7

Fig. & is an end elevation of Fig. 1 looked at from the direction of arrow 4.

In the illustrative embodiment of my invention I have shown the same mounted upon a portion 1 of any suitable forging machine or standard. A bracket generally indicated 2 has a longitudinally extending guide portion 2 provided with a T-shaped groove 3 which forms the guideway for the carriage mechanism later described. Extending downwardly from the guideway 2 are two arms 4 bolted to the portion 1 by bolts 4 The carriage mechanism comprises as more clearly shown in Fig. 3 a cylinder 5 having a laterally disposed T-shaped member 6 slidably mounted within the guideway 2 Extending upwardly from both ends of the cylinder 5 arebrackets' '8 and 9 having respectively slots 10 and 11. Slidably su portedon the carriage which includes tie cylinder 5is a pneumatic piston type hammer motor 12 preferably of a standard type and having a semi-cylindrical surface 13 adapted to have sliding contact with a preferably ground semi-cylindrical surface 14 formed on the upper side of the cylinder 5. haust port 15 communicates with a port 16 leading to the cylinder 5 while an atn1os pheric exhaust port 17 leads from the cylinder. the cylinder5 is adapted when disposed in the rear end of the Cylinder tohave its annular groove portion adjacent the port 16 to allow flow of exhaust fluid from the hammer exhaust port 15 to the rear side of the piston 18 as by a series of longitudinal flutes 19. Extending rearwar'dly from the portion 13 is a valve housing 20 from which projects a valve controlling stem 21 adapted to abut a cap 22 which has slidablecontact with the housing 20. A boss 23 projects rearwardly from the cap 22 and is disposed within the slot 10 to guide the rear end of the hammer mechanism 12. To limit movement of the valve housing 20 within the cap 22 an air inlet nipple 24 preferably secured in the housing 20 and communicating with a passage 25 extends through a slot 26 formed in the cap The hammering mechanism 12 and the valve mechanism just generally de scribed constitutes the invention of lVade H. l/Vineman and is disclosed in Patent No. 1,680,252, dated July 7, 1928. It will suffice to say that when the housing 20 and cap 22 are brought closer together by relative movement therebetween, the stem'21 will be forced inwardly to allow flow of fluid from the passage 25 to actuate the hammer piston within the hammering mechanism 12. The for ward end of the hammering mechanism is suitably supported by the carriage including the forward upstanding lug 9 which guides the punch 27 disposed within the slot 11.

To feed the pinning device forwardly to a drill steel 30 held stationary in any suitable manner and to controlflow of fluid to the front end of the cylinder 5 the following The ex-' A twospool piston 13 disposed within structure is provided. A valve housing 31 is mounted on the front end of the cylinder and has stepped bores 32 anc 33 the juncture of which provides a valve seat 34 having contact with an end seating valve 35. A stem 36 projects forwardly from the valve head 35 and is provided with areduced portion 37 to form a shoulder 38 which controls an atmospheric exhaust port 39 leading from the bore A passage 40 leads from the bore 33 to the cylinder 5 whilean air inlet 41 communicates with the bore 32. Threadedly secured in the boss 23 is a screw 42 having adjustable stop nuts 43 thereon. A substantially flat link member 45 has a bent portion 46 provided with an opening through which the screw 42 extends. This link 45 extends forwardlyto any suitable manually operable lever or handle and is suitably supported for longitudinal movement. Carried on the forward end of the link 45 is a depending arm 47 adapted to engage the valve stem 36. A spring 50 has its respective ends fastened. to a lug 51 extending laterally from the rear end of, the guideway 2 and to a lug 52 carried by valvehousing 31. Accordingly the spring constantly urges the carriage rearwardly.

In the operation, assuming theparts to be in their withdrawn position. the operator will move: the link 45 forwardly to engage the boss 23 thereby moving the hammer mechanism 12 forwardly to cause engagement of the punch 27 with-the drill steel 30 and also to cause the *cap 22 to move the valve stem 21 thereby permitting flow of fluid to the evlinder within the hammer mechanism 12. This will impart a series of impact blows to the punch and the exhaust fluid from the inner cylinder will flow through'the ports 15 and 16 and flutes 19 to the rear end of the cylinder 5., Due to the fact that motor exhaust pressure at all times'is far above atmospheric pressure, the piston 13 will he forced to the front end of the cylinder 5 and the normal exhaust from the motor will take place through the port 17. As the punch is driven into the steel the link 45 will cause movement of both the hammer iechanism and the carriage mechanism including the cylinder 5. During withdrawal of the punch the operator will move the link 45 rearwardly and due to the lost motion connection between the portion 46 and the nuts 43, the hammer and carriage mechanism will remain stationary. The arm 47 however. willmove rearwardly with the link 45 and will engage the valve stem 36. Upon engagement of the arm 47 with the stem 36, the valve will be opened thereby allowing communication between the bore-'32 and the passage 40 whereupon the sudden flow of fluid from the air inlet 41 to the cylinder 5 by way of the passage 40 will the cylinder 5. During this time the usual collar formed on the punch 27 will be en gaged with the upstanding lug 9 and the impact action will be transmitted to the punch to cause withdrawal thereof from the steel. The cap 22 upon initial rearward movement of the link 45 will be moved away from the end of the valve housing 20 by suitable means such as disclosed in the above mentioned application, thereby stopping operation of the hammering mechanism 12. It will also be clear that the arm 46 could engage the nuts 43 and positively move the collar 22 without necessarily causing any appreciable separation between the collar on the punch 27 and the lug 9 for thereason that the spring 50 urges rearwardly the carriage of which the lug 9 forms a part. The punch being lodged within the steel will ofcourse permit the spring 50 to hold the lug 9 in contact with the steel collar. 7

IVhile I have in this application specifically described one form which my invention may assume in practice, it will be understood that this form of the same is shown for purposes of illustration and that the invention naybe modified and embodied in Various other forms without departing from its spirit or the scope of the appended claims.

- What I claim as new and desire to secure by Letters Patent is:

1. A drill steel forming mechanism comprising a punch, means for first imparting a forward hammering action thereto consist- -35- ing of a series of repeated blows, and means for causing a rearward impact to be imparted thereto after said hammering action consisting of only a single blow.

2. A drill steel hole forming mechanism comprising a punch pin and a plurality of hammer mechanisms for acting thereon, one of said mechanisms driving said punch pin forwardly and the other rearwardly.

3. A. drill steel hole forming mechanism comprising a punch pin, a plurality of hammer mechanisms for acting thereon, means whereby one hammer mechanism will effect a series of hammer. blows automatically after power medium is supplied thereto, and

manual control means for causing each hammer blow of said other mechanism.

4. A drill steel hole forming mechanism comprising apunch pin, hammer means for driving said punch pin in opposite directions, manually operable means for controlling hammering ofsaid punch pin in each direction, and means whereby a series of forward hammer blows are imparted to said punch pin in one direction by one operation of said manual means and whereby each rearward hammer blow necessitates another separate operation of said manual means.

5. A hole forming mechanism comprising a punch pin, a plurality of pressure fluid operated hammer mechanisms for acting there- 'on, one of said hammer mechanisms drivin said punch pin forwardly and the other driving said punch pin rearwardly, and means for causing pressure fluid flow to each of said mechanisms when said punch pin engages a fixed steel including a valve mechanism common to both hammer mechanisms and through which fluid is transmitted to both hammer mechanisms.

7. In combination, a punch pin,a plurality of pressure fluid operated hammer mechanisms for acting thereon, means permitting actuating fluid to flow from one'mechanism to the other, and means whereby admission of actuating fluid to one of said mechanisms causes continuous operation thereof while the other mechanism is given limited operation.

8. In combination, a punch pin, a plurality of'power actuated hammer mechanisms for acting thereon, means whereby one becomes continuouslyoperative upon actuation, and means whereby said continuous opera-' tion of one mechanism causes the other mechanism to be partlally operated.

9. In combination, a punch pin, two power actuated hammer mechanisms for acting thereon, means whereby one becomes continuously operative upon actuation, and means whereby said contlnuous operatlon of one mechanism causes the other to be partially operated, said partial operation being initiated automatically upon initial operation of said continuously operated mechanism. 1

10. In combination, a punch pin, two power actuated hammer mechanisms for acting thereon, means for causing actuation of one of thesame, means for partially operating the other thereof automatically during said actuation of the first mechanism,and means for completing said partial operation of the second mechanism after said first mechanism is stopped.

11. In combination, a plurality of hammer mechanisms adapted to operate upon a single work piece each having a pressure fluid operated reciprocable element, and means for causing one of said elements to have a number of reciprocatory movements upon actuation, and means for causing the other element to have a lesser number.

12. In combination, a movable carriage carrying a pluarliiy of hammer mechanisms, a tool carried by one of said mechanisms, and means whereby both of said mechanisms are adapted to act on said tool in opposite directions.

13. The combination in pressure'fiuid optive to d support and one of said hammer mechams. lung bodily movable relative to the other.

15. In combination, a support, a pair of relatively movable power actuated hammer mechanisms mounted on said support, and means for automatically controlling actuationol one mechanism dependent on'relative movement beteween said hammer mecha-v nisms.

IG In combination, a support, a punch pin, a pair of relatively movable power actuated hammer mechanisms on said support for acting on said punch pin, means for effecting automatic operation of one of said mechanisms upon causing relative movement therebetween, means for causing partial operation of the other of said mechanisms upon said relative movement, and means for completing the operation of said second mechanism as the operation of said first mechanism is stopped.

17. In combination, a punch pin, power operatedmeans for hammering the same forwardly and rearwardly, manually shiftable means for controlling said hammering operations, means whereby upon movement of said. manual means in one direction a con tinuous succession of forward hammer blows will be imparted to said punch pin, and means wl'iereby movement of said manual means in the opposite direction will cause but a single blow to be imparted to said punch pin in the rearward direction.

18. In combination, a plurality of relatively movably mounted pressure fluid operated hammer mechanisms, a tool actuated thereby, manually shiftablc means for controlling flow of fluid to one of said mechanisms by movement in one direction, means whereby exhaust fluid from said first mechanism flows to the other mechanism to actuate pa tially the same, and valve mechanism controlled by movement of said manual means in the opposite direction for admitting live pressure fluid to said second mechanism.

19. A hole forming punch comprising pressure fluid actuated hammer mechanism, a carriage for supporting the same and having a cylinder fixed relative thereto, a

20. A hole forming device comprising a punch pin, a pressure fluid actuated hammer mechamsm for acting on the same, a cylinder, and a piston there1n,n1eans for imparting a rearward impact to said-punch pin by said piston, and means for controlling fluid flow to said hammer "mechanism and to said cylinder including a valve mechanism and means for operating said valve mechanism, including a member having a lost motion connection therewith.

21. -Hole formingmechanism' comprising a plurality of oppositely. acting pressure fluid'operated hammer mechanisms, means controlling operation of the same including a plurality of valve mechanisms, and manually opcrable means for controlling each of said valve mechanisms.

22. Hole forming mechanism comprising a plurality of oppositely acting pressure fluid operated hammer mechanisms, a plurality of valve mechanisms, one completely controlling operation of one of said mechanisms and the other adapted to control a partial operation of the other mechanism.

Hole forming mechanism comprising a plurality of oppositely acting pressure fluid operated hammer mechanisms, a plurality of valve mechanisms, one completely controlling operation of one of said mechanisms and the other adapted to control a partial operation of the other mechanism, and unitary means for successively operating said valve mecha nisms. I

24. A hole forming mechanism comprising a tool, a plurality of pressure fluid operated hammer mechanisms for actuating the same, and means for controlling fluid flow to the nine comprising a plurality of Valve mechanisms, means whereby operation of one of said valve mechanisms controls complete operation of one hammer mechanism and partial operation or" the other, and means whereby the other valve mechanism controls completion of said partial operation.

25. In hole opening apparatus for drill steels, the combination with a pressure fluid actuated hammer and its hole opening punch pin, of means for withdrawing the punch pin when lodged in a drill steel comprising a cylinder connected to said hammer in parallel relation and containing a hammer piston, means for eflecting movement of the hammer piston to and holding it at the end of the cylinder towards the punch pin, and means for suddenly admitting pressure fluid to that end to throw the hammer piston to the opposite end of the cylinder.

26. In hole opening apparatus for drill steels, the combination'ot a bracket adapted to be connected to a support, a carriage shiftable thereon having a cylinder rigidly connected therewith, an impact piston in said cylinder, a fluid pressure actuated hammer supported on the carriage and having a lost motion connection therewith, a punch pin carried by the hammer, means for shifting the carriage on the bracket, a pressure fluid admission valve for the cylinder, and means for opening said valve incident to movement of said cariage in one direction.

27. In a drill steel punch, a punch pin, an impact device acting on said punch pin to drive the latter into the work, and a second impact device acting on said punch 'pin to drive the latter from the work.

28. In a drill steel punch, a guideway, a punch pin, a hammer device acting on said punch pin to drive the latter into the work, a second hammer device acting on said punch pin to drive the latter from the work, and means for feeding said hammer devices for wardly and rearwardly relative to said guideway.

29. In a drill steel punch, a guideway, a punch pin, a hammerdevice acting on said punch pin to drive the latter into the work, a second hammer device acting on said punch pin to drive the latter from the work, means for feeding said hammer devices forwardly and rearwardly relative to said guideway, and means actuated upon a predetermined movement of said feeding means in one direction for stopping said first mentioned hammer device and starting said second mentioned hammer device.

30. In a drill steel punch, a punch pin, a pressure fluid actuated impact motor acting on said punch pin to drive the latter into the drill steel bore, a second pressure fluid actuated impact motor acting on said punch pin for driving the latter from the drill steel bore, means for supplying fluid from said first mentioned motor to effect movement of the impact element of said second mentioned motor in one direction, and separate means for supplying pressure fluid to said second mentioned motor to effect movement of the impact element thereof in the opposite direction.

31. In a drill steel punch, a pimch pin, a pressure fluid actuated impact motor act ing on said punch pin to drive the latter into the drill steel bore, a second pressure fluid actuated impact motor acting on said punch pin for driving the latter from the drill steel bore, means for conducting exhaust fluid from said first mentioned motor to said second mentioned motor to effect movement of the impact element of said latter motor in one direction, and separate means for supplying pressure fluid to said second mentioned motor to effect movement of the impact element thereof in the opposite direction.

fluid actuated impact motor acting on said punch pin for driving the latter from the drill steel bore, means for supplying fluid from said first mentioned motor to eifect movement of the impact element of said second mentioned motor in one direction, feeding means for said impact-motors for feeding the latter in opposite directions and means actuated by said feeding means upon predetermined feeding movement thereof in one direction to open a separate supply of pressure fluid to said second mentioned motor to effect movement of the impact element thereof in the opposite direction 33. In a drill steel punch, a guideway, a support element slidably guided thereon, a punch pin, an impact motor carried by said support and acting on said punch pin to drive the latter toward the work, a second impact motor including a cylinder and an impact element therein carried by said support, and an abutment fixed to said support and engageable with said punch pin whereby the blow imparted by the impact element of said second mentioned motor is transmitted through said support and abutment to said punch pin to drive the latter from the work.

In a drill steel punch, a guideway, a punch pin, a plurality of impact motors slidably supported on said guideway, one of said motors acting on said punch pin to drive the latter toward the work and the other acting on said punchvpin to drive the latter from the work, and means for feeding said impact motors forwardly and rearwardly relative to said guideway.

35. In a drill steel punch, apunch pin, an impact motor for imparting aseries of relatively light repeated blows to said punch pin to drive the latter toward the work, and a second impact motor for imparting but a 7 single relatively powerful blow to said punch pinto drive the latter from the work..

36. In a drill steel punch, a punch pin, an

impact motor for imparting a series ofrelatively light repeated blows to said punch pin to drive the latter toward the work, and a second impact motor for imparting but a single relatively powerful blow to said punch pin to drive the latter from the work, said first mentioned impact motor being in operative during the rearward driving action of said single-blow impact motor.

37. In a drill steel punch, apunch pin, an

impact motor for imparting a series of relatively light repeated blows to said punch pin to drive the latter toward the work, a second impact motor for imparting but a single. relatively powerful blow to said punch pin to drive the latter from the work, and means operative during the forward driving action of said first mentioned motor for supplying fluid to sa'idsingle-blow motor to retract the impact element thereof.

38. In a drill steel punch, a punch pin, an impact motor for imparting a series of relatively lightrcpeated blows to said, punch pin to drive the latter toward the work, a second impact motor for imparting but a single relatively powerful blow to said punch pin to. drive the'latter from the work, and means operative during the forward driving action of said first mentioned motor for supplying exhaust fluid from said motor to said singleblow motor to retract the impact element thereof.

39. In a drill steel punch, a punch pin, an impact motor for imparting a series of relatively light repeated blows to said punch pin to drive the latter toward the work, a second impact motor for imparting but a single relatively powerful blow to said punch pin to drive the latter from the work, means operativeduring the forward driving action of said first mentioned motor for supplying exhaust fluid from said motor to said singleblow motor to retract the impact element thereof, and means operative during the rearward movement of said first mentioned motor for supplying fluid to said single-blow motor to effect the working stroke of the impact element thereof.

40. In a drill steel punch, a punch pin, means for delivering a series of rapid relatively light blows to said punch pin to drive the latter toward the work, and means wher by but a single relatively powerful blow may be delivered to said latter from the work.

41'. In a; drill steel punch, a punch pin, hammering means including a relatively light short stroked impact element operative upon forward movement of the hammerin means to deliver a series of relatively rapid light blows to said punch pin to drive the latter toward thefwork and a relatively long stroked heavy impact element operative upon rearward movement of said hammering means to deliver but a single powerful blow to said punch pin to drive the latter from the work, and means for effecting forward and rearward movements of said hammering means,

In testimony whereof I aflix my signature.

WADE H. WVINEMAN.

punch pin to drive the 

